My billion-dollar idea…

I was listening to Mark Cuban on Howard Stern yesterday. Mark Cuban is the owner of the Dallas Mavericks (basketball), a billionaire, and has a new TV show “The Benefactor”. I am always interesting in billionaires, so I looked for more info about him on the Internet and found his blog. He has invested $100 million into a company HDNet who will distribute HD quality shows and movies to viewers most likely in a Netflix format. The interesting thing is the HD quality is takes so much memory that it won’t fit onto a DVD (even the new formats coming out next year), so they are looking at distributing the shows/movies on miniature hard drives. Hard drives are expected to be around 25 cents per gigabyte by next year, so they could potentially sell a 20 gigabyte hard drive with a movie on it for prices that compare with today. You would then connect this to your TV via firewire and watch your program.

This kind of relates to where I think a market exists on the internet. Why not offer an online hard drive? Here are the benefits for the users:

1. Use as much or as little memory as you need. Many computers come with from 80 to 250 gigabyte hard drives. This will always be too much for some and not enough for others. Perhaps charge a very minimal monthly fee depending on the amount of storage used. Maybe $5 per month for 100 gigabytes and an additional $5 for every 100 gigabytes.
   
2. Never lose your information to a hard drive crash. The data would be backed-up onto other hard drives.
   
3. Connect to your information and programs anywhere.
   
4. Upgrade your computer without having to transfer everything from one hard drive to another. You would load all of your programs onto your virtual hard drive.

Does this make sense? Has anyone heard of something like this? Does anyone want to pay me a billion dollars for this idea?

UPDATE: I found this company, but it looks expensive. and 5 GB isn't a whole lot of memory.